Question to Engineers and gadget freaks alike

so RFID is just about everywhere these days, toll pay transmitters, inmates, cattle, wal-mart, passports, license plates, u name it. i just read an article about an RFID course to help workers have an edge in a competitive business world, cept that course is in Australia. what i wanna know is what do you guys know about RFID? is it worth taking a $300 class? if its possible id like to just tinker with RFID at home by myself, like i do with most everything else. i think hands-on learning is a billion times better than any textbook-oriented class.